imagecolorresolvealpha
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
imagecolorresolvealpha — Get the index of the specified color + alpha or its closest possible alternative
설명
int imagecolorresolvealpha
( resource
$image
, int $red
, int $green
, int $blue
, int $alpha
)This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.
인수
-
image -
imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.
-
red -
Red 컴포넌트 값.
-
green -
Green 컴포넌트 값.
-
blue -
Blue 컴포넌트 값.
-
alpha -
A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
반환값
Returns a color index.
예제
Example #1 Using imagecoloresolvealpha() to get colors from an image
<?php
// Load an image
$im = imagecreatefromgif('phplogo.gif');
// Get closest colors from the image
$colors = array();
$colors[] = imagecolorresolvealpha($im, 255, 255, 255, 0);
$colors[] = imagecolorresolvealpha($im, 0, 0, 200, 127);
// Output
print_r($colors);
imagedestroy($im);
?>
위 예제의 출력 예시:
Array
(
[0] => 89
[1] => 85
)
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